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Miniature & Small ball bearings -8. Measurement methods

General rules regarding verifying ball bearing dimensions and runout are specified in JIS B 1515-2. Please refer to below for the dimensions and measurement methods of runout.


Dimensions
1. Bore (ds) figure8-1
2. Outer Diameter (Ds) figure 8-2
3. Inner Ring Width (Bs) figure 8-3
4. Outer Ring Width (Cs) figure 8-4
Runout
1. Side Runout of Inner Ring (Sd) figure 8-5
2. Outside Cylindrical Surface Runout with Side (SD) figure 8-6
3. Radial Runout of Inner Ring (Kia) figure 8-7
4. Radial Runout of Outer Ring (Kea) figure 8-8
5. Axial Runout of Inner Ring (Sia) figure 8-9
6. Axial Runout of Outer Ring (Sea) figure 8-10

Remark: [ ] is the expression in previous JIS.



Measure the amount of change
within the radial plane
Bore (dS)
figure 8-1

Measure the amount of change
within the radial plane
Outer Diameter (DS)
figure 8-2

Measure while rotating inner ring
one revolution
Inner Ring Width (BS)
figure 8-3

Measure while rotating outer ring
one revolution
Outer Ring Width (CS)
figure 8-4

Read the indicator while rotating inner ring one revolution
Side Runout of Inner Ring (Sd)
figure 8-5

Read the indicator while rotating outer ring
one revolution
Outside Cylindrical Surface Runout with Side (SD)
figure 8-6

Read the indicator while rotating inner ring one revolution with dead weight placed on inner ring
Radial runout of inner ring (Kia)
figure 8-7

Read the indicator while rotating outer ring one revolution with dead weight placed on outer ring
Radial runout of outer ring (Kea)
figure 8-8

Read the indicator while rotating inner ring one revolution with dead weight placed on inner ring
Axial runout of inner ring (Sia)
figure 8-9

Read the indicator while rotating outer ring one revolution with dead weight placed on outer ring
Axial runout of outer ring (Sea)
figure 8-10

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Home ... Engineering Information... Miniature & Small ball bearings... Selecting a Bearing... 8. Measurement methods